24 May 2000 Analysis and optimization of convergent Fourier-transform setups for optical correlators
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Proceedings Volume 4089, Optics in Computing 2000; (2000) https://doi.org/10.1117/12.386819
Event: 2000 International Topical Meeting on Optics in Computing (OC2000), 2000, Quebec City, Canada
Fraunhofer diffraction at finite distances can be produced by a variety of optical setups. Convergent arrangements, in which the diffracting object is illuminated by a converging spherical wave-front, are of special interest since they enable an easy control over the size of the resulting diffraction pattern. In particular, such arrangements are frequently used in optical correlators as a means to obtain the Fourier transform in the input scene. We analyze the effect of the wave aberration introduced by the convergent optical system in the resulting Fourier transform, both experimentally and by a computer simulation, as well as its impact over the correlation plane. Also, we introduce a simple optimization method that gives good results in alleviating the loss of space invariance, which is the most important side effect found in the study.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Julio Perez-Tudela, Mario Montes-Usategui, Ignacio Prades Juvells, Santiago Vallmitjana, "Analysis and optimization of convergent Fourier-transform setups for optical correlators", Proc. SPIE 4089, Optics in Computing 2000, (24 May 2000); doi: 10.1117/12.386819; https://doi.org/10.1117/12.386819


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